Hi everyone.. I was doing some experiments on diffraction and interference. For the single slit I used a shaving razor blade and cut it into half along its length. Then I placed the two halves together forming a slit such that the two sharp edges almost touched each other, similar to the one in the attachment. Then I shone my laser and got some diffraction patterns.. I repeated the experiment with the razor blades, not on any mount, but poked onto a rubber cube so that I could change the aperture during the experiment. As I started moving the blades together, they simply attracted each other and got stuck, leaving no aperture. I tried again, at a particular distance they stick to each other. But with the blunt edges facing each other, this does not happen. It seems they are attracting each other.. why? This seems to be a new phenomenon for me, so let me know what's behind all this.. Thanks for any replies.